Bi-annual	US dollars
1987-06-30	131
1987-12-31	159
1988-06-30	171
1988-12-31	154
1989-06-30	95
1989-12-31	55
1990-06-30	16
1990-12-31	23
1991-06-30	29
1991-12-31	28
1992-06-30	29
1992-12-31	36
1993-06-30	41
1993-12-31	64
1994-06-30	68
1994-12-31	97
1995-06-30	102
1995-12-31	160
1996-06-30	185
1996-12-31	241
1997-06-30	193
1997-12-31	245
1998-06-30	187
1998-12-31	215
1999-06-30	183